How to Insert Fireplace Doors

Remove the fireplace glass doors from the box and stand the doors up on their bottom edge. The doors won't stand on their own, so you can lean them against a ledge or even against your legs while you work.

Use a screwdriver to remove the four screws on the back of the door. These bottom screws are where the floor brackets will go, and the top screws are where the lintel clamps will go. Set the screws in a safe place because you will use them later during your fireplace door installation.

Attach the two lintel clamps to the top back of the door where you removed the top screws. Use two of the screws you set aside to secure the lintel clamps in place. The screws secure the lintel clamps to your glass door's frame through a slot, which allows you to adjust the location of the clamp up and down so it precisely fits your existing fireplace frame.

Secure the two floor brackets to the fireplace frame using the other two screws you set aside.

Place your fireplace glass door kit in the opening of your fireplace. Take care not to scratch the finish on your door surround, but make sure the doors fit snugly.

Open the glass doors, then reach inside your fireplace and mark the location of your floor brackets so you know where to drill to secure the doors to your fireplace. Use a thick marker that you can easily see and make a mark in the groove of your floor bracket on each side.

Pull the door unit out of your fireplace and set it aside gently.

Drill a pilot hole at least 2 inches deep where you made your two floor bracket marks. Use a drill fitted with a 5/16-inch masonry bit to drill your pilot holes. Use a wet/dry vacuum to remove the dust created when you drilled your pilot holes. Using a hammer, tap a lead anchor into each pilot hole until the top of the lead anchor is flush with the surface of the brick you drilled into.

Look in the glass fireplace door kit for fiberglass insulation and unroll it around both sides and around the top of the door insert. Make sure to wear work gloves while you do this. If the pieces are too long, tear them to the appropriate length. Stuff the fiberglass insulation into all three channels on the glass door insert.

Slide your glass fireplace doors back into your fireplace frame. Look around the perimeter of the frame and make sure there's no insulation sticking out. If there is, stick it back in. Make sure all sides of your fireplace insert sit flush inside the fireplace opening.

Drill sheet metal screws through the lintel clamps at the top of your insert and through the floor brackets at the bottom of your insert (in the pilot holes you drilled previously). Tighten the screws with a socket wrench to make sure you securely fasten them to the brick.

Finish the job by installing the hardware. Use your fingers to tighten the enclosed hardware on the lintel. Once you can't tighten it any more with your fingers, give it another quarter-turn using a pair of pliers.